// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_
#define CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_

#include <stddef.h>
#include <stdint.h>

#include <memory>
#include <string>

#include "base/compiler_specific.h"
#include "base/macros.h"
#include "base/memory/shared_memory.h"
#include "base/sync_socket.h"
#include "content/renderer/pepper/pepper_device_enumeration_host_helper.h"
#include "ipc/ipc_platform_file.h"
#include "ppapi/c/ppb_audio_config.h"
#include "ppapi/host/host_message_context.h"
#include "ppapi/host/resource_host.h"

namespace content {
class PepperPlatformAudioInput;
class RendererPpapiHostImpl;

class PepperAudioInputHost : public ppapi::host::ResourceHost {
public:
    PepperAudioInputHost(RendererPpapiHostImpl* host,
        PP_Instance instance,
        PP_Resource resource);
    ~PepperAudioInputHost() override;

    int32_t OnResourceMessageReceived(
        const IPC::Message& msg,
        ppapi::host::HostMessageContext* context) override;

    // Called when the stream is created.
    void StreamCreated(base::SharedMemoryHandle shared_memory_handle,
        size_t shared_memory_size,
        base::SyncSocket::Handle socket);
    void StreamCreationFailed();

private:
    int32_t OnOpen(ppapi::host::HostMessageContext* context,
        const std::string& device_id,
        PP_AudioSampleRate sample_rate,
        uint32_t sample_frame_count);
    int32_t OnStartOrStop(ppapi::host::HostMessageContext* context, bool capture);
    int32_t OnClose(ppapi::host::HostMessageContext* context);

    void OnOpenComplete(int32_t result,
        base::SharedMemoryHandle shared_memory_handle,
        size_t shared_memory_size,
        base::SyncSocket::Handle socket_handle);

    int32_t GetRemoteHandles(
        const base::SyncSocket& socket,
        const base::SharedMemory& shared_memory,
        IPC::PlatformFileForTransit* remote_socket_handle,
        base::SharedMemoryHandle* remote_shared_memory_handle);

    void Close();

    void SendOpenReply(int32_t result);

    // Non-owning pointer.
    RendererPpapiHostImpl* renderer_ppapi_host_;

    ppapi::host::ReplyMessageContext open_context_;

    // Audio input object that we delegate audio IPC through.
    // We don't own this pointer but are responsible for calling Shutdown on it.
    PepperPlatformAudioInput* audio_input_;

    PepperDeviceEnumerationHostHelper enumeration_helper_;

    DISALLOW_COPY_AND_ASSIGN(PepperAudioInputHost);
};

} // namespace content

#endif // CONTENT_RENDERER_PEPPER_PEPPER_AUDIO_INPUT_HOST_H_
